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I have a three button mouse, but the middle button is not doing anything. Left & right together are mapping to what the middle mouse button should be doing.

How can I setup X to use a three button mouse?

I'm using Ubuntu Server, installed X from apt-get. Also, I'm using fluxbox for the window manager.

I just need to get the button working, the wheel is currently working properly.

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The wheel or an actual middle button? also what Linux distribution are you using? it may make things a bit easier. – John T Dec 29 '09 at 19:53
Edited my question with some more details – Jeffrey Aylesworth Dec 29 '09 at 20:45
By 'button' do you mean pressing on the wheel so it clicks, or another separate button? – atroon Dec 29 '09 at 21:22
I mean pressing the wheel down. – Jeffrey Aylesworth Dec 30 '09 at 0:34
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2 Answers

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Try running xev in a terminal and click the affected button in the test window that pops up. It should register an event.

Also, test the mouse on another machine. Eliminate variables.

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it doesn't give an event, but it does for left and right, and together it sends mouse button two. The mouse works, I've been using it for a long time, including on that computer in a previous install, the mouse works perfectly. I'm fairly confident that X is just not configured to use a three button mouse (though I'm not sure why the scroll wheel would work in that case). – Jeffrey Aylesworth Dec 30 '09 at 0:34
Looks like it's not configured for 3-button mice. Try mucking with your xorg.config file, if one even exists in Ubuntu these days. – Broam Dec 30 '09 at 15:21
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It may be time to look in you xorg.conf file. (Use locate xorg.conf to find it) You'll need to be root to edit it (i.e. use sudo).

Use man xorg.conf for a fairly detailed description of the contents. You're looking for the "InputDevice" section to start. On my Debian box the mouse details are in the mouse (4) manpage.

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